Gastec Tubes and Sampling Pump
Short terms quick measuring detector tubes 
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Gas sampling pump kit and accessories
 
 
 
Index of target gases/substances : B
Gas or Vapour
to be Measured
Chemical Formula
Gastec Tube
No. & Name
Measuring
Range
(ppm)
No.of
Pump
Strokes
Shelf
Life
(year)
Note TLV-
TWA,C
(ACGIH)
(ppm)
Benzaldehyde
C6H5CHO
91L Formaldehyde 4-92 1 3* T -
Benzene
C6H6
121 Benzene 60-120 1 3 - 0.5
5-60 2
2.5-5 4
121L Benzene 10-65 1 3 +
0.1-10 5
121S Benzene 120-312 1 3 +
5-120 2
2-5 4
121SL Benzene 20-100 1 3 +
1-20 5
121SP Benzene 20-66 1 2 +
0.2-20 3
171 Acetylene 0.03-0.6% 4 3 T
Benzyl bromide
C6H5CH2Br
136L Methyl bromide 25-850 1 2 + -
Benzyl chloride
C6H5CH2Cl
132L Trichloroethylene 1.6-20 2 2* T 1
Boron trichloride
BCl3
12L Hydrogen cyanide 0.5-20 2 2 H -
Bromine
Br2
8La Chlorine 0.05-0.8 4 3 - 0.1
Bromochloromethane :
Chlorobromomethane
CH2BrCl
135 Methyl chloroform 22-110 1 3 +T 200
136H Methyl bromide 18-270 1 3 +
136L Methyl bromide 11-110 1 2 +
136LA Methyl bromide 0.7-12.6 2 2 +
Bromoform
CH3(CH2)2CH3
136L Methyl bromide 1-50 1 2 + 0.5
1,3-Butadiene
CH2:CHCH:CH2
174 1,3-Butadiene 50-800 1 3 T 2
174L 1,3-Butadiene 5-100 4 3 -
2.5-5 8
174LL 1,3-Butadiene 0.5-5 1 3* -
Butane
CH3(CH2)2CH3
104 Butane 25-1400 1 3 - 800
103 Hydrocarbons
(Lower Class)
0.84-1.68% 1/2 2* ++
0.07-0.84% 1
0.035-0.07% 2
n-Butanol
CH3CH2CH2CH2OH
114 n-Butanol 10-150 3 3 T C 50
sec-Butanol
CH3CH2CH(OH)CH3
115 sec-Butanol 5-150 3 3 T 100
2-Butanone :
Mehtyl ethyl ketone
CH3COC2H
5
152 Methyl ethyl ketone 0.02-0.6% 2 3 T 200
152L Methyl ethyl ketone 10-120 1 2* T
120-384 1/2
151L Acetone 21-1680 5 2* T
Butyl acetate
CH3CO2(CH2)3CH3
142 Butyl acetate 0.05-0.8% 2 3 T 150
142L Butyl acetate 10-300 2 2 T -
tert-Butanol
(CH3)3COH
102L n-Hexane 0.05-1.2% 2 3 - 100
Butyl acrylate
CH2:CHCO2C4H9
142L Butyl acetate 7-210 2 2 T 2
Butyl amine
CH3(CH2)3NH2
180 Amines 8-160 1 3 T C5
180L Amines 0.55-11 1 2 T
tert-Butylamine
(CH3)3CNH2
180 Amines 5.5-110 1 3 T  
n-Butyl bromide
C4H9Br
136H Methyl bromide 24-360 1 3 +  
136L Methyl bromide 10-100 1 2 +
136LA Methyl bromide 2.4-43.2 1 2 +
1-18 2
Butyl mercaptan
CH3(CH2)3SH
70L Mercaptans 6.4-12.8 1/2 2 - 0.5
0.8-6.4 1
0.32-0.8 2
0.16-0.8 4
tert-Butyl mercaptan
(CH3)3CSH
75 tert-Butyl mercaptan 60-150mg/m3 1/2 2 T -
30-60mg/m3 1
2.5-30mg/m3 2
75L tert-Butyl mercaptan 15-30mg/m3 1/2 2* T
1-15mg/m3 1
0.5-1mg/m3 2
77 TBM&DMS 1-15 mg/L 1 2* +T
70L Mercaptans 4-8 1/2 2 -
0.5-4 1
0.2-0.5 2
0.1-0.5 4
Butyric acid
CH3CH2CH2CO2H
81L Acetic acid 0.325-13 1 2* T -
Butyronitrile
CH3CH2CH2CN
191L Acrylonitrile 6-180 1 3 + -
T:Temp Correction H:Humidity Correction *:Refrigerator Store Mesh:Correction Factor/Chart
 
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